Labconco Cell Logic+ B2 User Manual page 13

The exhaust system must be capable of moving the following volumes of exhaust air at
the negative pressures listed. The Airflow Volumes are the values recorded via direct
measurement using a flow hood at the front opening of the cabinet. The Concurrent
Balance Values are measured in the exhaust duct via traverse methodology, and will
always be higher due to differences in volume measurement methodologies.
NOTE: The Concurrent Balance Values (CBV) is established by NSF during listing
testing. The static pressure listed is measured at the biosafety cabinet's connection to
the exhaust system. The values published include 0.7 inches H
the biosafety cabinet's original pressure. In order to obtain maximum exhaust HEPA
filter loading, the system should be capable of generating a static pressure 1.3 inches
higher than the Recommended Duct Vacuum pressure listed in Table 2-1.
Cell Logic+
Type B2 Model
4-foot, 8" Sash
6-foot, 8" Sash
1: WC = Inches of Water Column, typically expressed in units of inches H
NOTE: The facility's remote blower cannot run at its nominal flow rate with the sash
completely closed. If the sash must be closed completely to utilize the internal UV Light
(optional), then the facility's remote blower must be shut off or its flow rate reduced by
90% or more for proper operation of the biosafety cabinet. The Cell Logic+ biosafety
cabinet has an optional EN/Dry Contact Board that contains dry relay contacts which
can be configured to signal the facility's remote blower to turn on and turn off (or reduce
speed). For further information, contact Labconco's Product Service Department or
refer to the Logic+ Technical Manual. A remote electrical switch to control the facility's
remote blower can also be installed near the biosafety cabinet for manual control of the
remote blower.
Concurrent
Airflow Volume
Balance Value
3 3
3
ft /min m /hr ft
723 1228 852
1083 1840 1265
13
O of filter loading from
2
Recommended
Duct Vacuum
3
/min m /hr WC
1448 1.8
2149 2.2
Table 2-1
1
Pa
450
550
O.
2